Lab-grown body parts, extreme surgery heal wounded troops

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In this Monday, Aug. 20, 2012 photo, Marine Sgt. Ron Strang gets up from a chair in the living room of his home in Jefferson Hills, Pa. just south of Pittsburgh. He lost half of his left thigh muscle in a bomb blast in Afghanistan and with an experimental implant of connective tissue developed from pigs, it has had it strengthened. "It's been a huge improvement," he says. (AP Photo/Keith Srakocic)